[GHC] #13429: Optimizer produces Core with an infinite <<loop>>

[GHC]

#13429: Optimizer produces Core with an infinite <<loop>>
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        Reporter:  lehins            |                Owner:  simonpj
            Type:  bug               |               Status:  merge
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
                                     |  simplCore/should_run/T13429,
                                     |  T13429_2
      Blocked By:                    |             Blocking:
 Related Tickets:  #13750, #12545    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Remarkably, this patch also apparently fixed #13750

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13429#comment:29>
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